Trouble shooting 12
INDOOR UNIT Error Method:
Indoor Unit Fan Motor Error
Indicate or Display:
Indoor Unit : Operation LED 5 times Flash, Timer LED 1 Times Flash,
Economy LED Continuous Flash.
Outdoor Unit : E.5 U.1
Error Code : 5 1
Detective Actuators:
Indoor Unit Controller PCB
Indoor Fan Motor
Detective details:
When Indoor fan control is either phase control or DC control and rotation feed
back control is ON, the feed back rotation value becomes 0 and lasts for more
than 1 minute at motor operation condition. Or, the feed back rotation value
continues at 1/3 of target value for more than 1 minute.
Check Point 2 : Check Motor winding
Check Indoor Fan motor
>>If Fan motor is abnormal, replace it.
Check Point 1 : Check rotation of Fan
Rotate the fan by hand when operation is off.
(Check if fan is caught, dropped off or locked motor)
>>If Fan or Bearing is abnormal, replace it.
Check Point 3 : Check ambient temp. around motor
Check excessively high temperature around the motor.
(If there is any surrounding equipment that causes heat)
>>Upon the temperature coming down, restart operation..
Check Point 4 : Replace Controller PCB
OK
OK
OK
Forecast of Cause : 1. Fan MOTOR failure 2. Fan motor winding open 3. Motor protection by surrounding temp. increase
4. Controller PCB failure
Change Controller PCB and execute the check operation again.
02-28
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